Disk brake



2 Sheets-S'hleet l Il'. m "lll-1.:

INVENTOR.

BY Carolus L. Eksergan.

DISK RAKE C. L. EKSERGIAN MHH, .7

oct. 13, 1953 Fiied July 29. 1950 @Kil ATTORNEY l da. 13,1953

Filed July 29,- 1950 c. EKSERGIAN DISK BRAKE 2 Sheets-Sheet 2 Patented Oct. 13, 1953 UNITED sTATEs PATENT ori-ICE DISK BRAKE Carolus L. Eksergiam-Mcdla, Pa., assignor to The Budd Company, Philadelphia vania tion o! Pennsyl Pa., a corpora-4 I Application July ze, 195o, serial No. 176,695

(cl. lass-72) iced, and one which has `long life.

Other and further objects and advantages Vandl the manner in which they are attained will become evident from the following detailed de scription when read in connection with the accompanying drawings forming a part of the specication.

In the drawings: Y

Fig. 1 is an elevational view of the novel brake mechanism, looking at the inboard side of a wheel with which it is shown associated, parts being broken away and parts shown in section,

the view being taken substantially along the lline i-I of Fig. 2, looking in the direction of the arrows at the ends of the line;

Fig. 2 is an enlarged detail sectional view taken substantially along the line 2-2 of Fig. 1;

Fig. 3 is a similar sectional view taken substantially along the line 3--3 of Fig. 1; and

Fig. 4 is a detail sectional view taken substantially along the line 4 4 of Fig. 1.

In the drawings, the brake mechanism embodying the invention has been shown associated with the rear wheel of an automobile, but it will be understood that it is equally applicable to a front wheel or in other relations, if desired.

The wheel designated by numeral I is a usual form of disc wheel having a drop center rim Il seated on and secured in a usual manner tothe peripheral iiange- I2 of the wheel. The `wheel is removably mounted on the hub ange I3 by an annular series of bolts,l as I4. The hub barrel I5 is 'non-rotatably secured in usual manner upon the tapered end I6 of the axle I1, and the latter is rotatably mounted in the axle housing I8 through the roller bearings as I3. A

The rotating element of the improvedbrake comprises a dished supporting plate 28 seated. in

2 of the supporting plate and the location of the brake ring 23 adjacent the rim leaves ample space radially inwardly between the'brake ring vand the axle housing for the disposition of the stationary brake mechanism associated with the rotating element.

This mechanism comprises a radially disposed spider 21 having a flat annular radially inner bolting-on portion 28, through which it is rigidly secured to the anged end 29 of the axle housing by a series of bolts 38. The inner periphery of the annular portion 28 may, as shown in Fig. 2, overlap the outer race of the bearing I9 to hold the bearing in place. Between the inner periphery of the portion 28 and the axle I6 is shown in# serted a packing ring .3| for coniining the oil for the bearing.

The spider 21 supports the segmental Vbrake shoes 32 and 33 for cooperation with the opposite braking faces 24 and 25, respectively, of thev rotary brake ring 23, and also carries the means for actuating the shoes.

The spider 21 is provided on opposite sides of the axle, see Fig. l, with radially outward extensions 34 and 35 which are bifurcated at their outer ends as is clearly shown in Fig. 3, the furcations being designated 36 and 31, respectively. Between these radially outward extensions, the spider is provided with an integral cylinder 38 for actuating the shoes.

The shoes 32 and 33 are lined on their working faces with a suitable brakelining, as 39, and on their opposite faces they are provided with three aligned spaced apertured bosses 40, 4 I, and 42, see Fig. l, through which they are supported-by the bifurcated radially outer arms of the actuating levers 43 and 44. The furcations of the outer arms are designated, see Fig. 1, 45 and 45, and are disposed in the spaces between the bosses 40, 4I, and 42 on the adjacent shoe'. A hinge pin 45' havingr a drive t with the bosses and a loose fit with the lever furcations secures the parts together in operative relation.

The levers 43 and 44 have their intermediate portions pivotally mounted, through pins 46 and 41,on the furcations of the radial extensions 34 and 35 of the spider. The levers have radially inwardly extending arms 48 and 43, respectively, operatively connected to the pistons 50 and 5I of the actuating cylinder 33, ythrough the link struts 52 andl 53, respectively.

4Suitable flexible dust seals 54 and 55 are provided between the inner ends of the levers and the adjacent ends of the cylinder, and the pistons are also provided with suitable seals as 56 and 3 81 between them and theA cylinder wall. The space between the pistons is connected by a port, as 58, see Fig. 1, to a suitable fluid-pressure line. and another port, as 59, may connect the fluidpressure line to the other wheel associated with the axle. The topof the cylinder may be provided with a bleeding port closed by a plug 60.

With the arrangement shown and described, the shoes may be made so they are interchangeable, and the same is true of the actuating levers, the pistons and struts, and the seals associated with the cylinder and pistons.

To hold the shoes parallel to each other and spaced a suitable distance apart, when the brakes are not applied, the following means may be employed, one such means being provided at each of the adjacent ends of the shoes. Only one such means need be described, and reference is had to Figs. 1 and 4 in the following description.

Such means may comprise a U-shaped element 6l of channel section embracing the adjacent shoe ends. One arm B2 of the U is rigidly secured as by a bo1t'63 to the back of one shoe, as 33, and the other arm 04 is slidably mounted on an elongated bolt 85 secured to the back of the other shoe 32. A spring 66 encircling the bolt B5 and acting at its opposite ends upon Athe head 61 of the bolt and upon the arm 64 acts yieldingly to force the shoes apart. The distance the shoes are forced apart is determined by an adjustable stop nut 58 on the bolt 65.

It may also be desirable to provide means for holding the shoes spaced equal distances from the opposite sides of the brake ring, when the brakes are not applied. Such means may comprise an arm 69 rigidly bolted, through a bolt 69 (Fig. l), at one end to the adjacent extension 34 or 35 of the spider 21 and having a bolt 10 pass through its opposite end and being loosely guided in the adjacent arm 64 of the U-shaped member. A spring Il surrounding the bolt and reacting at its ends on the ann 69 and the adjacent arm 64 of the U-shaped member 6l holds the shoes spaced equal distances from the opposite faces of the brake ring, the distance being controlled by the adjustable nut 12 locked in adjusted position by a lock nut 13.

The operation of the brake mechanism is believed clear from the foregoing detaileddescription.

While a specific form of the invention has been described in detail, it will be understood that changes and modifications may' be made by those skilled in the art without departing from the spirit and scope of the' appended claims.

What is claimed is:

1. In a vehicle brake, in combination with a wheel, axle, and axle support, arotary brake element supported at its radially outer periphery and having spaced radially extending braking faces held in axially fixed position, opposed segmental brake shoes supported in cooperative relation with the respective radial braking faces, and supporting and actuating means for said shoes comprising a radially extending spider secured at its radially inner portion to the axle support, said spider carrying an integral actuating cylinder, said cylinder having opposed pistons operatively connected at the opposite ends of the cylinder to brake levers, said brake levers being mounted on pivot pins carried by xed supports rigid with the spider, and said brake levers being connected by pivot pins to the respective shoes.

2. In a vehicle brake, in combination, a rotary brake element having spaced annular radially extending braking faces, opposed segmental brake shoes supported in cooperative relation with the respective braking faces, and means associated with the adjacent ends of the shoes for normally yieldingly maintaining them spaced apart a predetermined distance, said means comprising a U-shaped member embracing the adjacent shoe ends and having one arm of the U rigidly secured to one shoe and the other arm yieldingly secured to the other shoe.

3. In a vehicle brake, in combination, a rotary brake element having spaced annular radially extending axially xed braking faces, opposed segmental brake shoes supported in cooperative relation with the respective braking faces, an axially fixed support for said shoes, means associated with the adjacent ends of the shoes for normally yieldingly maintaining them spaced apart a predetermined distance, and means associated with said first-named means and said support for yieldingly maintaining the shoes spaced substantially equal distances from said braking aces.

4. In a vehicle brake, in combination with a wheel, axle, and axle support, a rotary brake element supported from its radially outer periphery and having spaced annular radially extending braking faces held in axially fixed lposition, opposed segmental brake shoes supported by brake levers in cooperative relation with the respective radial braking faces, and a support for the shoes and levers comprising a radially extending spider secured at its inner end to the axle support, said spider being provided with pivotal means rigid therewith for mounting the intermediate portions of the brake levers which have their outer ends pivotally secured to the respective shoes, and a cylinder actuator rigidly carried by the spider and having oppositely movable actuating elements disposed between and acting on the inner ends of said levers.

5. In a vehicle brake, in combination, a rotary brake element having spaced annular radially extending braking faces, opposed segmental brake shoes supported in cooperative relation with the respective braking faces. a support for said shoes supporting them intermediate their ends, means associated with the adjacent ends of the shoes for normally yieldingly maintaining them spaced apart a predetermined distance, said means comprising a U-shaped member embracing the adjacent shoe ends and having one arm of the U rigidly secured to one shoe and the other arm yieldingly secured to the other shoe, and means for yieldingly maintaining the shoes spaced substantially equal distances from the braking faces comprising a member rigidly se- Acured to said support and yieldingly secured to said U-shaped member.

cARoLUs L. EKSERGIAN.

References Cited in the file of this patent UNITED STATES PATENTS 

